Lunch bag



FIG. 1 is a front perspective view of the lunch bag.

FIG. 2 is a front view of the lunch bag.

FIG. 3 is a rear view of the lunch bag.

FIG. 4 is a left view of the lunch bag.

FIG. 5 is a right view of the lunch bag.

FIG. 6 is a top view of the lunch bag; and,

FIG. 7 is a bottom view of the lunch bag.

The broken lines are directed to environment and form no part of the claimed design. 

The ornamental design for a lunch bag, as shown and described. 